<template>
    <div class="add-role">
      <header class="add-header">
        <div class="left">
          <span class="arrow" @click="$router.back()"><i class="el-icon-arrow-left" />返回</span>
          <span>|</span>
          <span>{{id?'编辑角色':'添加角色'}}</span>
        </div>
        <div class="right">
          KKK
        </div>
      </header>
      <main class="add-main">
        <div class="step-container">
          <el-steps direction="vertical" :active="activeStep">
            <el-step title="角色信息" />
            <el-step title="权限信息" />
            <el-step title="检查并完成" />
          </el-steps>
        </div>
        <div class="form-container" v-show="activeStep===1">
          <div class="title">角色信息</div>
            <div class="form">
                <el-form class="form-box" :model="roleForm" :rules="roleRules" ref="roleForm">
                    <el-form-item label="角色名称" prop="roleName">
                    <el-input v-model="roleForm.roleName" />
                    </el-form-item>
                    <el-form-item label="角色描述" prop="remark">
                    <el-input v-model="roleForm.remark" />
                    </el-form-item>
                </el-form>
            </div>
        </div>
        <div class="form-container" v-show="activeStep===2">
          <div class="title">权限配置</div>
          <div class="tree-wrapper">
          <div class="tree-item" v-for="item in treeList" :key="item.id">
            <div class="tree-title">{{ item.title }}</div>
            <!-- shou-checkbox展示复选框 -->
             <!-- default-expand-all 默认展开 -->
              <!-- check-strictly 解除父子级的关联 -->
            <el-tree
              ref="tree"
              :data="item.children"
              show-checkbox
              check-strictly
              default-expand-all
              node-key="id"
              :props="defaultProps"
            />
          </div>
          </div>
        </div>
        <div v-show="activeStep === 3" class="form-container">
          <div class="title">检查并完成</div>
          <div class="form">
            <div class="info">
              <div class="form-item">角色名称：{{ roleForm.roleName }}</div>
              <div class="form-item">角色描述：{{ roleForm.remark }}</div>
              <div class="form-item">角色权限：</div>
              <div class="tree-wrapper">
                <div v-for="item in treeList" :key="item.id" class="tree-item">
                  <div class="tree-title">{{ item.title }}</div>
                  <el-tree
                    ref="disabledTree"
                    :data="item.children"
                    show-checkbox
                    check-strictly	
                    default-expand-all
                    node-key="id"
                    :props="{ label: 'title' ,disabled:() => true}"
                  />
                </div>
              </div>
            </div>
          </div>
        </div>
      </main>
      <footer class="add-footer">
        <div class="btn-container">
          <el-button @click="prev" v-show="activeStep!=1">上一步</el-button>
          <el-button type="primary" @click="next" v-show="activeStep!=3">下一步</el-button>
          <el-button type="primary" v-show="activeStep===3" @click="confirmAdd">确认添加</el-button>
        </div>
      </footer>
    </div>
  </template>
  
  <script>
  import { getTreeListAPI,createRoleUserAPI,getRoleDetailAPI,updateRoleAPI } from '@/api/system';
  export default {
    name:'AddRole',
    data() {
        return {
            activeStep:1,
            roleForm:{
                roleName:'',
                remark:'',
                perms:[]
            },
            roleRules:{
                roleName: [
                    { required: true, message: '请输入角色名称', trigger: 'blur' }
                ],
                remark: [
                    { required: true, message: '请输入描述名称', trigger: 'blur' }
                ]
            },
            treeList: [],
            defaultProps:{
              label:'title'
            }
        }
    },
    computed:{
      id(){
        return this.$route.query.id
      }
    },
    created(){
      this.getTreeList()
      if(this.id){
        this.getRoleDetail()
      }
    },
    methods:{
      // 回显数据
      async getRoleDetail(){
        const res = await getRoleDetailAPI(this.id);
        this.roleForm = { ...this.roleForm, ...res.data }; // 确保只更新存在的属性
        this.$nextTick(() => {
          if (this.$refs.tree) { // 检查是否已经存在tree引用
            this.$refs.tree.forEach((item, index) => {
              item.setCheckedKeys(this.roleForm.perms[index] || []); // 确保perms存在
            })
          }
        })
      },
      // 添加或编辑角色
      async confirmAdd() {
        if(this.id){
          delete this.roleForm.userTotal
          await updateRoleAPI(this.roleForm)
          this.$message.success('编辑角色成功')
        }else{
          await createRoleUserAPI(this.roleForm)
          this.$message.success('添加角色成功')
        }
        this.$router.back()
      },
      // 获取所有的权限列表
      async getTreeList(){
        const res = await getTreeListAPI()
        this.treeList = res.data
      },
      // 点击上一步
        prev(){
            if (this.activeStep === 1) return
            this.activeStep--
        },
        // 点击进行下一步
        next(){
            if (this.activeStep === 3) return
            // 第一步的同一校验
            if(this.activeStep === 1){
                this.$refs.roleForm.validate(flag =>{
                    if(!flag) return
                    this.activeStep++
                })
            } else if(this.activeStep === 2) {
              // 进入下一步前，加入判断【用户是否勾选权限信息】
              const treeComponentList = this.$refs.tree
              //  每次点击下一步之前 先清空perms中原有数据
              this.roleForm.perms = []
              treeComponentList.forEach(tree => {
                this.roleForm.perms.push(tree.getCheckedKeys())
              })
              // 把二维数组展开成一维数组
              if(this.roleForm.perms.flat().length <= 0){
                this.$message.warning('还没有勾选权限信息')
                return
              }
              const disabledTreeList = this.$refs.disabledTree
              disabledTreeList.forEach((tree, index) => {
                tree.setCheckedKeys(this.roleForm.perms[index])
              })
              this.activeStep++
            } 
        },
    }
  }
  </script>
  <style scoped lang="scss">
  .add-role {
    background-color: #f4f6f8;
    height: 100vh;
  
    .add-header {
      display: flex;
      justify-content: space-between;
      padding: 0 20px;
      height: 64px;
      line-height: 64px;
      font-size: 16px;
      font-weight: bold;
      background-color: #fff;
  
      .left {
        span {
          margin-right: 4px;
        }
  
        .arrow {
          cursor: pointer;
        }
      }
  
      .right {
        text-align: right;
      }
    }
  
    .add-main {
      position: fixed;
      top: 64px;
      bottom: 88px;
      width: 100%;
      overflow-y: auto;
      background: #f4f6f8;
      padding: 20px 230px;
      display: flex;
      .step-container {
        height: 400px;
        width: 200px;
      }
      .form-container {
        flex:1;
        background-color: #fff;
        overflow-y: auto;
        .title {
          height: 60px;
          line-height: 60px;
          padding-left: 20px;
        }
        .form {
          margin-bottom: 20px;
          padding: 20px 65px 24px;
          .el-form {
            display: flex;
            flex-wrap: wrap;
          }
          .info{
            font-size:14px;
            color:#666;
            .form-item{
              margin-bottom:20px;
            }
          }
        }
        .form-box{
          width: 600px;
          display: flex;
          flex-direction: column;
        }
      }
    }
  
    .add-footer {
      position: fixed;
      bottom: 0;
      width: 100%;
      padding: 24px 50px;
      color: #000000d9;
      font-size: 14px;
      background: #fff;
      text-align: center;
      z-index: 10001;
    }
    .tree-wrapper {
        display: flex;
        justify-content: space-between;
        flex-wrap: wrap;
        .tree-item {
          flex: 1;
          padding: 0px 4px;
          text-align: center;
          .tree-title {
            background: #f5f7fa;
            text-align: center;
            padding: 10px 0;
            margin-bottom: 12px;
          }
        }
      }
  }
  </style>